From Sahih Bukhari (Hadith 6415):
Narrated Sahl:I heard the Prophet (ﷺ) saying, "A (small) place equal to an area occupied by a whip in Paradise is better than the (whole) world and whatever is in it; and an undertaking (journey) in the forenoon or in the afternoon for Allah's Cause, is better than the whole world and whatever is in it
Reference: Bukhari 6415